ArchivesUSA (USC electronic resources page)
The ArchivesUSA database provides information about primary source materials from nearly 4,800 US manuscript repositories. ArchivesUSA includes records, complete with detailed indexes, about nearly 109,000 manuscript and other special collections.
The Historical Manuscripts Commission Part of the UK National Archives, has a specific role to organize and disseminate information about the location of manuscript collections across the country. Their website is http://www.hmc.gov.uk/
Archives Hub National gateway to descriptions of archives in UK universities and colleges.
Accessible Archives (USC Electronic Resources). Archival 18th- and 19th century Northeast newspaper resources.